I'm non-transitioning mtf so I'm pretty genderqueer from the other direction, perhaps I can lend some perspective
While strapons are kind of a duh sort of thing, I don't think they're masculine by nature, plenty of women use them who don't identify as queer (and I personally enjoy the genderfuck of using them on my female partner). Using a more realistic dildo may help you to feel more masculine, or maybe using a dildo like the Feeldoe or Share which can allow you to derive more pleasure (potentially) from the penetration could help as well.
I assume you may also generally be dominant in the bedroom? Though I'm sure there are plenty of ftm submissives as well. Perhaps having a partner perform oral on a realistic strapon could be a good way to explore a typical male fantasy/interest in the bedroom.
In terms of making your body more masculine, being in full male drag might be a little much in the bedroom, but doing something as simple as wearing boxers and a wife beater during sex might enhance your feelings of masculinity. Perhaps wearing cologne, allowing more hair growth, or other physical changes like binding breasts (which you may or may not do) might help as well.
Part of it is just figuring out what you enjoy best about the masculine idea and pushing that with everything you do. Hope that helps a little!